Easy to use, have the directions on the package carefully followed and 2 Gore-Tex clothing and a pair of trousers by VAUDE with Ceplex Active impregnated coating. The next day, after everything was dry, try the impregnation under the tap. Madness! ! ! Pertl water off completely, not even the smallest wet track on the clothes! As if I had the place cleaned with a dry cloth and not doused with water. Have other sprays (and brands) have achieved significantly worse results.